application/*
application/vnd.openxmlformats-officedocument.wordprocessingml.document
File extensions: .docx
Microsoft Word Open XML document.
What is application/vnd.openxmlformats-officedocument.wordprocessingml.document?
This long media type identifies a Microsoft Word .docx document — a ZIP container holding Office Open XML parts. Serving it correctly triggers the right OS handler on download.
Typical usage
Word document downloads from web apps, mail attachments.
Common gotchas
Do not serve .docx as application/zip — even though it is a ZIP internally, the specific type is required for the OS to associate it with Word or a compatible editor.
HTTP header example
Response header
Content-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=utf-8